Lori Anne Butler, 20, was last seen at a teen disco in Kissimmee about 8:30 p.m. Friday, said her mother, Marie Butler.

Butler, of 1134 Kelso Blvd., went to the disco about 8 p.m. with her brother Alan, 18, their mother said. About 15 minutes later, she told her brother she planned to leave with a man she had just met. The two argued, then Lori left, her mother said.

Mrs. Butler said her daughter has suffered from mild epilepsy since she was 11, but takes the drug mysolene to control it. She said her daughter had several pills in her purse, but did not have a prescription refill with her. The drug is not sold over the counter.

The mother said Butler has left home before, but always called within a day to let her parents know where she was. Mrs. Butler said her daughter had been depressed because she has not been able to find work and broke up with her boyfriend last week.

Mrs. Butler said she is afraid her daughter may be having seizures by now, and may be unable to call home if she is alive.

Butler is about 5-foot-5, 125 pounds, with hazel eyes, shoulder-length blonde hair, and acne. She was wearing blue jeans, a yellow sweater and a dark blue corduroy blazer when she disappeared.

Anyone with information should call the Orange County Sheriff's Office.